My zimbra server has crazy spikes on load avarage, this is what happens:
works as usual load is 0.2-0.5 then suddenly goes up to 20-40 load avarage for like few minutes then go normal again.
Now I installed htop, to monitor what exactly is going on during those spikes, this is what i get:
I have 500+ users, only imap+web. Limit for imap connections is 2000.
12GB ram, Intel(R) Xeon(R) CPU E5620 @ 2.40GHz (16 cores)
Running on Ubuntu 8.04 64 Bit.
Zimbra version Release 6.0.8_GA_2661.UBUNTU8_64 UBUNTU8_64 FOSS edition.
I've done the follwoing fix High CPU spikes every 1 minute but still. got spikes, not so often tho.
Can any1 tell where to look for problem?